Schweitzer Engineering Laboratories SEL-387E - Self-Test Failure: +12 V PS; Self-Test Failure: +15 V PS; Self-Test Failure: +5 V PS; Self-Test Failure: +5 V REG

10-46 Testing and Troubleshooting Date Code 20080110
SEL-387E Instruction Manual
Self-Test Failure: +5 V PS
1. Power supply +5 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: +5 V REG
1. Regulated +5 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: -5 V REG
1. Regulated –5 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: +12 V PS
1. Power supply +12 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: -12 V PS
1. Power supply –12 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: +15 V PS
1. Power supply +15 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: -15 V PS
1. Power supply –15 V output out-of-tolerance. See STA (Status Report) , Section 7:
Communications
.
2. A/D converter failure.
Self-Test Failure: Offset
1. Offset drift.
2. A/D converter drift.
3. Loose ribbon cable between transformers and main board.